Call of Duty: Modern Warfare 3 weapon proficiencies are earned by continued use of your weapons as you level them up (separate from leveling up your player). The longer you use a weapon, the more proficiencies you earn.

Proficiences are used along with weapon attachments to make you and your chosen weapon a more dangerous foe to face on the battlefield. Not all proficiencies are available for all weapon types.

Call of Duty: Modern Warfare 3 weapon proficiencies are:

  • Kick – reduced recoil
  • Impact – increased penetration of your rounds
  • Attachment – allows the use of 2 attachments
  • Focus – reduces flinching when you are hit while firing
  • Breath – reduces sight sway
  • Stability – a sort of automatic “breath” where idle weapon sway is reduced
  • Melee – faster recovery after melee attacking a foe
  • Speed – faster movement speed
  • Damage – increased damage
  • Range – increased range for your weapon